Cells
Clue: This cell structure is known as the “powerhouse” because it produces energy.
Answer: What is the mitochondrion?
This molecule carries genetic information in cells.
What is DNA?
The process where organisms better adapted survive and reproduce.
What is natural selection?
This system breaks down food into nutrients.
What is the digestive system?
Organisms that make their own food from sunlight.
What are producers?
This organelle controls the cell and holds DNA.
What is the nucleus?
A segment of DNA that codes for a trait.
What is a gene?
Structures like human arms and whale flippers that show common ancestry.
What are homologous structures?
The system responsible for transporting oxygen and nutrients.
What is the circulatory system?
A close relationship where both species benefit.
What is mutualism?
These cells are usually larger and more complex, containing membrane-bound organelles.
What are eukaryotic cells?
When both alleles are the same (AA or aa).
What is homozygous?
These structures have the same function but different structures, like bird wings and butterfly wings.
What are analogous structures?
This system controls the body using the brain, and electrical signals.
What is the nervous system?
The path or flow energy takes from one organism to another.
What is a food chain?
These organisms—such as bacteria—are always unicellular and have no membrane-bound organelles
What are prokaryotes?
A chart that predicts the probability of offspring traits.
What is a Punnett square?
This scientist proposed natural selection (Theory of Evolution) as the mechanism for evolution.
The Who is Charles Darwin?
These organs exchange oxygen and carbon dioxide.
What are the lungs?
In a food web, this type of organism is always found at the base because it provides energy for all other levels.
What are producers?
This process uses energy to move molecules from low concentration to high concentration.
What is active transport?
A change in DNA that creates variation in a population.
What is a mutation?
According to Darwin, individuals with traits that help them survive are more likely to reproduce. This idea is called:
What is “survival of the fittest”?
Bones, cartilage, and joints belong to this system.
What is the skeletal system?
This type of symbiosis occurs when one organism benefits and the other is harmed, like a tick feeding on a dog.
What is parasitism?